package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.AccountRepeatException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import com.sky.vo.EmployeeVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.Objects;


@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    @Autowired
    private HttpServletRequest httpServletRequest;

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    @Override
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        // 1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        // 2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            // 账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 密码比对
        // TODO 后期需要进行md5加密，然后再进行比对 -- e10adc3949ba59abbe56e057f20f883e
        String md5Digest = DigestUtils.md5DigestAsHex(password.getBytes());

        if (!md5Digest.equals(employee.getPassword())) {
            // 密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            // 账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        // 3、返回实体对象
        return employee;
    }

    @Override
    public void create(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        // 1. 给属性（数据要）赋值
        BeanUtils.copyProperties(employeeDTO, employee);
        // 校验用户名是否重复 18 zs/  19 zs  查询 修改
        Integer count = employeeMapper.selectCountByUsername(employee);
        if (count > 0) {
            throw new AccountRepeatException(MessageConstant.ACCOUNT_REPEAT);
        }
        Long userId = BaseContext.getCurrentId();


        // 加密
        String password = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(password);
        employee.setStatus(StatusConstant.ENABLE);

        // 2. 入库 - entity
        employeeMapper.insert(employee);
    }

    @Override
    public PageResult selectPage(EmployeePageQueryDTO employeePageQueryDTO) {
        // 1. 开启分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());

        // 2. 写原始查询
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeePageQueryDTO, employee);

        Page<Employee> employeePage = employeeMapper.selectPage(employee);
        employeePage.getResult()
                .forEach(item -> item.setPassword(null));
        return new PageResult(employeePage.getTotal(), employeePage.getResult());
    }

    @Override
    public void updateStatus(Long id, Integer status) {
        Employee employee = new Employee();
        employee.setId(id);
        employee.setStatus(status);
        employeeMapper.updateById(employee);
    }

    @Override
    public EmployeeVO queryById(Long id) {
        EmployeeVO employeeVO = new EmployeeVO();
        Employee employee = employeeMapper.selectById(id);
        BeanUtils.copyProperties(employee, employeeVO);
        return employeeVO;
    }

    @Override
    public void updateById(EmployeeDTO employeeDTO) {
        // 校验更新后的username不重复
        Integer count = employeeMapper.selectCountByUsernameToRuleOut(employeeDTO.getUsername(), employeeDTO.getId());
        if (count > 0) {
            throw new AccountRepeatException(MessageConstant.ACCOUNT_REPEAT);
        }
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.updateById(employee);
    }

}
